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64 Pin Simms

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June 27, 2010 - 2:35pm
lostcluster
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Hello,

I was going through my old simms and found 4 Texas Instruments TM024EAG8 64 pin simms and 4 (I believe TWI) 64 pin simms with Siemens chips. Is there any way to tell if these are for the IIfx or an old Amiga?

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January 14, 2011 - 1:52am
#1
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grannysmith
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Re: 64 Pin Simms

64-pin SIMMs were also used in one-or-other Apple LaserWriter, but the cards were too slow for the IIfx, which needs 80ns chips or faster.

http://www.everymac.com/systems/apple/mac_ii/stats/mac_iifx.html

You can get the chip speed usually from the type-number's suffix, often of the form '-80' or the like. Help in interpreting the type-number may be acessible at:

http://www.chipmunk.nl/DRAM/ChipManufacturers.htm

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January 14, 2011 - 10:15am
#2
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DrBunsen
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Re: 64 Pin Simms

grannysmith wrote:

but the cards were too slow for the IIfx, which needs 80ns

I suppose if one was desperate, one could downclock the IIfx?

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